Feed-water injector



(No Model.) 7 J. JENKS.

Peed Water Injector.

No. 242,652. i Patented June 7,1881.

.' fniren Z7034.

UNITED STATES PATENT OFFICE.

JAMES JENKS, T DETROIT, MICHIGAN.

FEED-WATER INJ ECTO R.

SPECIFICATION formingpart of Letters Patent No. 242,652, dated June '7, 18 1.

Application filed October 23, 1880. (No model.)

To all whom it may concern: 7

Be it known that 1, JAMES JENKS, of Detroit, in the county of Wayne and State of Michigan, have invented an Improvement in Feed-\Nater Injectors, of which the following is a specification.

My invention relates toimprovements in that class of feed-water injectors in which the impurities in the boiler are prevented from entering' the feed-water injector and interfering with itsoperationby means of a screen or strainer secured within the steam-pipe which connects the boiler and injector.

The invention consists in the peculiar construction and arrangement of the couplin g and parts connected therewith, by means of which the screen may be inserted or removed and held in place, as hereinafter more fully set forth, and pointed out in the claim.

In the accompanying drawings, which form a part-of this specification, there is shown a view of a feed water heater such as is described in=my application for .a'patent which was allowed September 13, 1880, and wherein]? represents the steam-pipe which is designed to connect the boiler and injector. As it frequently occurs that impurities from the boiler are forced by the steam into the interior of the injector, (or from the interior of the intercommunicatin g pipe,) which materially affect and sometimes prevent the operationot such injector, I secure within the pipe F, preferably near the body or operating parts of such injector, a screen, S, preferably of wire-gauze of sufficient-fineness of mesh as not to interfere with the free passage of steam, whereby all impurities are prevented from entering the injector.

b represents a coupling,

The wire-gauze screen S is secured in position in the pipe F in thefollowing manner:

a represents an interiorly screw-threaded coupling, which forms a part of the in ector.

screw-threaded exteriorly near its lower end to engage with the interior screw-threads of the coupling a. The 4 coupling 1) is bent outwardly near its nnddle to form an interior shoulder or seat, 0, for the outer frame of the screen S to rest on when in position in the pipe F; and the coupling 1) is also interiorly screw-threaded near its up- 5 per end, to engage with the screw-threaded end of the pipe F, provided with a shoulder, 0, bearing against the upper edge of the coopling b. By meansof this construction the wiregauze screen can readily be inserted and removed and held securely in place.

I am aware that strainers have heretofore been employed in the steam and water p pes leading to an injector, as shown in Letters Pat ent granted to W. H. Nowell, dated June 1877, No. ].9l,7 73, and Ithereforelay no claim broadly, to such invention.

What I claim as my invention is- The combination, in an injector, of the interiorly screw-threaded coupling a with the coupling b, screw-threaded interiorly near its up per end and exteriorly near its lower end, an

having the shoulder or seat a, pipe F, exterimly screw-threaded near its end and provided wit the shoulder e, and wire-gauze screen S, sub stantiall y as described, and for the purposla ef. forth.

JAMES JENE Witnesses:

H. S. SPR-AGUE, CHARLES J. HUNT. 

